Method of making bearings and bearing materials



- Patented' Dec. 4, 1934 a mrrnon or MAKING BEARINGS AND BEARINGMATERIALS Charles F. N'oiftzger, Chicago, 111.

' No Drawing. Application February 12,1932.

,' Serial No. 592,659

oiaims. (c1. 308-242) The following fomulae'have been ioundhighlydesirable, the percentages being by weight:

The main objects of my invention are: l 1. To provide a material havinghigh antifriction and wearing qualities, whereby it is well adapted forbearingsfor all classes of machinery, L Resin Per --5 includinghighspeed machinery. scrim; 56 60 2. To provide a bearing which isself-lubricatcamauga WM a 4 ingavey durable, and capable of sustainingheavy Dead t 22 ca s. 1 3.-.To, provide a--.bearing having these advan-J Per .cent tages, which can be manufactured very economi- Resi cally. vSericite 61 4. To provide "an improved method 0! making Zinc Y 15bearings and bearing material. Carnauba W 4 i 5. To' provide, a new and.provedmaterial I Per l for usein molding bearings and the like. ResinObjects pertaining to details and economies oi! p 58 my invention willdefinitely appear -from the de- Zinc dust 14 scription to-follow. Theinvention is defined in Camauba wax 5 the claims- .Cotton flock 4 :20The material andbearing of this application are further developments ofand. improvements upon the material and bearing of my Patent No.

in shackle bolt bearings. The relative amount of The last formula hasproved excellent for use -26 bearing consisting of pulverulent sericiteschist finished i sa0 and an lniusiblephenolic condensation product APreferred composition by Volume my and other materials as abinder.bearing material consists of: I

I have improved upon the material and bear-. 7 Parts 'ing of that patentby the addition to the compmve l t t ln t 5 position of a pulverulentmetal such as lead, zinc t Sericite schist 4 'or bronze, acombination-of metals, and/or a Binder. 1 wax suchas carnauba. The"metals are intro- Flock duced in a pulverulent or flnely divided stateand Wax 1 /4 35 serve to conduct the heat from the bearing. The Thepreferred method of making bearings and 1,791 4 dated February-10 1931,1hi h 1 115- metal and resin or other binder depends to a conclose ahighly desirable-bearing material and Siderable extent upon the y r q d01 the a greatly fafiilitalfes the m l f and bearing material inaccordance with my invenm di s, and alsos v to nn t a meastion is asfollows: The wax is melted and mixed we the ab a v Q y o the phenolicresi with the sericite schist. This mixture is thorwhen that material isused as a binder. The oughly cooled and then pulverized in a grinding4.0 sericite schist isa, very.satisfacto ry anti-friction machine. Themetal, such as lead, is pulverized materiaLbut in producing thebearingsit is inand reduced to very small particles by any suittimatelyassociated withthe phenolic resin, and Bible method. Preferably-Such aspassing h g the wax greatly assists in getting the mol d a 200 meshscreen. The lead dust is thoroughly product out of the o mixed with thepulverulent wax and sericite 45 M50 p efer blyadda; small amountof h 5schist and the binder which has previously been :00

inc. i 1 50 The materials", when serlcite schist, metal, the

,55. lnzthereof flock which is particularly, desirable where thedissolved with a solvent, suchas alcohol, amyl f a relatively thin bushacetate, or the like. The entire mixture is then bearing is h isubjected to heat to eliminate the solvent by evaporation, afterwhich'the resulting mass is r reduced to comminuted or pulverulent formby and ke" s are thgmughly grinding. At this state, the bearing materialis mix d an molded un r a Subjected in the form or finely dividedparticles like sand to h at, ha i W e t r n im binders and is ready tobe molded into a bearing, or the are employed requiring neat; fortheproper moldlike, under heat and pressure.

, v In certainof the claims I use the term bearno ing metal which termincludes the well known bearing metals, such as lead, Babbitt metal,bronze, and other like bearing alloys. The wax may be paraffin, carnaubaand the like and/or any material having the properties of wax. While Iprefer to use a phenolic binder, any suitable binder may be used.

In the above description I have mentioned lead, zinc, and bronze asbeing suitable metals. Other metals such as brass and Babbitt andtheir'alloys, and other metals and alloys may be used. My improvedbearings have very excellent wearing and anti-friction qualities, do notrequire lubricant, may be used 'on high speed machinery without becomingoverheated, and also have the advantage of being very economicallyproduced.

It is obvious that various changes and modifications may be made in thedetails of construcon and design of the above specifically describedembodiments of my invention without departing from the spirit thereof,such changes and modifications being restricted only by the scope of thefollowing claims.

Having thus described my invention, what I claim as new and desiretosecure by Letters Patent is:

l. The method of making bearings, which comprises melting wax, mixingthe melted wax with sericite schist, cooling the mixture, pulverizingthe product, mixing pulverized lead with the pulverized mixture of waxand sericite schist, dissolving a phenolic binder with a solvent, mixingthe dissolved binder with the pulverized material, heating to evaporatethe solvent, pulverizing the resulting product, and molding under heatand pressure.

2. The method of making bearings, which comprises melting wax, mixingthe melted wax with sericite schist, cooling the mixture, pulverizingthe product, mixing pulverized lead with the pulverized mixture of waxand sericite schist, dissolving a binder with a solvent, mixing thedissolved binder with the pulverized material, heating to evaporate thesolvent, pulverizing the resulting product, and molding.

3. The method of making bearing material, which comprises mixing wax andsericite schist, cooling, and comminuting, mixing the product with apulverulent bearing metal and a binder, and pulverizing the resultingproduct.

4. The method of making moldable material for bearings, which comprisesmixing molten wax with sericite schist, cooling, and comminuting,

mixing the product with pulverulent metal and a dissolved binder,eliminating the solvent in the binder by evaporation, and pulverizingthe resulting product to the consistency of fine sand.

5. The methodof makingmoldable material for bearings, which comprisesmixing molten wax with sericite schist, cooling, and comminuting, mixingthe product with pulverulent metal and a dissolved binder, eliminatingthe solvent in the binder, and pulverizing the resulting product.

CHARLES F. NOFTZGER. v

